观点1

第一个负面影响是城市人口过多导致房价飚高无法负担，并导致共公共设施的短缺。这是因为公共设施和生存空间无法满足日以上涨的人口的需求。

观点2

另一个负面影响是城市人口将面临严重的环境污染和资源短缺。举例来说，如今车辆的增多意味着温室气体大量排放，污染了空气。

观点3

城市大量人口导致工作竞争激烈，就业率下降，这进一步导致让人们生活压力变大，有可能会引发心理问题。

开头段

In current times, more than half of the

population dwell in cities,and I believe

that this is a negative development.

主体段

观点

The major negative influence is that the

overcrowding of cities leads to

unaffordable housing prices and the

shortage of amenities.

观点的补充说明

This is because the infrastructure

and living areas cannot meet the

demand of the increasing

population in cities. 

主体段观点

Another negative impact is that people

in cities are faced with environmental

pollution and a shortage of natural

resources because of over-population.

观点的补充说明

For example, nowadays more vehicles

are on the roads compared with the

past, which emit a huge amount of

green-house gases and contaminate

the air.

主体段观点

The unemployment rate may increase,

as the competition for working

opportunities becomes ever more

furious.

观点的补充说明

As a result, city residents are faced

with huge living pressure, which

may further lead to psychological

problems.

结尾段

In conclusion, more than half of the

population living in cities is a

negative development. People should

be aware of the negative impacts of

the phenomenon and try hard to

avoid its influences.